A principle of iterative development exists to execute the high-risk components of the system first. this approach best descends into Use-case-driven development.
Iterative development exists as a software development approach that supports the development of a system incrementally. The process builds in common and frequent cycles for feedback from stakeholders established on reactions by end users to the working, although incomplete, system. Iterative software development suggests building the product step by step, which permits for the identification and correction of defects during the earlier stages, to avoid their downward flow into further processes.
One of the key elements of the Unified Process is its usage of use cases as a driving force for development. The phrase use case driven guides to the fact that the project team uses the use cases to navigate all development work, from initial gathering and negotiation of requirements through code.
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